Composition roofing and process for producing it.



I "To aliwho'm it UNTE WILLIAM A.. BILES, OFIBTRMING M; ALABAMA.

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Be it known that I, WILLIAM A. Buns, a cltizen of the United States, residing at Birmmgham, the county of Jefferson and State, of Alabama, have invented new an useful Improvements in Composition Root-v ing and Process for Producing It, of which the following isa s ecification.

My invention ates to the art of producmg a water roof composition mater al particularly a apted for roofing, and "of such character that it can be spread or a lied with a trowel, or molded into tiles or Eibcks in the improved manner hereinafter scribed.

My invention consists in the novel article reduced. by my process and in the process y which the article is produced.

My invention further consists in the novel process by which the composition is treated and subjected to hydraulic pressure in the formation of tiles, blocks, etc.-

It is the purpose of my invention to utilize calcined magnesite in powdered form having not in excess of two percent. of carbonic acld with chlorid of magnesium as a'binder of from 18 to 22 Baum, and add to this as a base a powdered or finely crushed mass of inert matter, preferably slate or coal mine tailings, and a water proofing substance of vegetable extraction, preferably resin or vegetable tars or pitches.

In manufacturing my improved roofing I take calcined magnesite which has been treated to reduce the carbonic acid therein to a point not in. excess of two percent. and

which is prefcrablylin as finely powdered condition as can be obtained and add to this oughlyfmixed dry, 3 quantityof an the inin-t substance which is preferably pulverized slate, though where it is not desired that the roofing be essentially refractory, I may substitute for the slate, coal mine refuse or tailings, but if the roofing is to be essentially refractory, however, I use slate and, if, desired, may combine with it crushed or macerhtedasbestos. To the calcined magnesite and the pulverized inert substance I add a quantity of powdered resin, or, what I consider an equivalent thereof, vegetable tar or pitehy; After the magnesite, the inert substance and the resin have been thor- I then add a sufficient aqueous solution of chlorid of froml8 to 22 Baum, to remagnesium of duce the mixture to a mastic condition so I Specification of Letterdlatent. Application filed October 29, 1905. Serial No. 460 ,0e2.-

Patented, Aug. 10, 1909.

read by a trowel or laced I that it may bes' ere formed into ties or in molds and t blocks. v

The percentage by weightof chloridof magnesium will e fromtwenty to twentyfive ercent. of the weight of' the mass to whic it is added as an a ueous solution. The variation in the degrees aum is largely dependent upon temperature conditions, the 18 solution bein used when the temperature is highest ant tern erature is lowest.

T e relative proportions in which the above component parts. may. be mixed is subject to some variation, but I find the following composition to give satisfactory results: Totwenty parts of powdered calcined magnesite in which the carbonic acid five parts of inertmatter which may consist entirely of pulverized slate, or tailings (chalmine refuse), or I may use sixty-five parts ofpulverized slate and ten parts of crushed or macerated asbestos, ;.the asbestos, however, not being an essential element. To the above elements is added five parts of owdered resin or vegetable tar or pitch and after all have been thoroughly mixed, I add a sufficient quantity of an a ueoussolution ofchlorid of magnesium to ring the mass to the desired mastic condition, which quantity, as stated above, will vary from twenty to twenty-five, per cen mass to which it is added.

In manufacturing the mastic composition as thus formed'i nto tiles, 1 have found that if themass be placed in the mold and allowed to remain from two to three hours to, permit the chlorid of magnesium and the owdered calcined magnesite to combine and set, and the mass be hydraulic pressure, that clear water -only. will be ex ressed, leaving the entire (Luantity of 0 mid of magnesium in the lock and thus producin -a superior article over the rocess in whic animmediate pressing W0 d resultin expressing a large percentage of the chlorid of magnes'um cm the mass. In the claims appended to this specification, tailings areconsidcred an equivalent of slate, except when the latter is used in pitch of tar an equivalent of resin. resultant article, while most adapted for roofing purposes, may be used otherw se.

the 22 solution when the does not exceed two per cent, add seventyin weight of the 4,

I then subjected to. r

'combinatron with asbestos; and vegets ibtlle 0 Having thus described my invention, what I 0 sun as new and "desire to secure by Let- I .ters Patent, is I 1. A novel water-proof composition consisting of twenty arts of magnesite, seventyfive parts of crus led slate, five parts of resin, and chlorid of magnesium in quantity equal to from twenty to twenty-five ercent. by weight of the other elements in t 10 composi- LIOII.

2. The process of manufacturii-ig refraotory composition roofing which consists in making a dry mixture of powdered. calcined magncsitc, pulverized slate, crushed asbestos 1 and powdered resin, treating the said dry mixture with an aqueous solution of chlorid of magnesium of from 18? to" 22 Bauln, allowing the mastic composition to remain in the molds until an initial set has taken effect and then subjectin the mass to a heavy pressure in the mol s. I

3. The herein described process of manufacturing artificial roofing which consists inl mixing seventy-five arts of inert matter with five arts of pow parts of ely powdered calcined magnesite m which the percentage of carbonic acid l ered resin and twenty eaogsee does not the addition of an aqueous solution of chlorid of magnesium, equal to from twenty to twenty -five parts by weight of the other elements and permitting the same to set.

4. he herein described process for manufacturing a refractory composition roofin which consists in making a dry mixture of powdered calcined magnesite, pulverasbestos and powdered mastic condition by the addition of an aqueous solution of chlorid of magnesium, allowing the mastic in the molds until an mitlal' set has taken effect and then subjecting the mass to a heavy pressure in the molds.

n testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILLIAM A. BILES.

Witnesses V R. D. JOHNSTON, J1'.,

ANNIE L. PEASE.

said dry mixture to a mastic condition by I said dry mixture to a composition to remain- 

